Can you get it tested--contact your ag ext agent.

May 31, Late spring leaf drop was caused by an unpredictable pest called the maple petiole borer. Why are leaves dropping from my maple trees? A close examination of leaves on the ground will likely show leaves with only a small portion of their stems (petiole).

This leaf drop is caused by the feeding of maple petiole borers, Caulocampus stumpdelimbing.barted Reading Time: 2 mins. Apr 12, Why is my maple tree losing lots of leaves now? You said the leaves were still green when they fall, but the stems looked darkened.

There could be several reasons for leaf drop, Author: Tom Bruton. Sep 01, Did you know the small piece that connects a tree leaf to its stem is called a petiole?

September 24,

Tiny petiole borers feed on that, which makes leaves break from the stem and fall off. Luckily, the amount of leaf loss is small, and the pests don't pose a real threat to maple trees. Tar leaf spot is more noticeable. It turns maple leaves yellow, then black before they fall off.

Sep 27, If you spot the above symptoms on your tree, maple decline could be plaguing your tree. Also, look for leaves that are too light in color or look burnt. If there are fewer leaves than normal, that’s another telltale sign. What exactly is maple decline? Unlike many of the problems your tree faces, maple decline is not a tree disease or a tree pest.

Instead, maple decline is a result of trees living in. May 30, When maples suddenly drop their leaves in June or July, it's usually due to drought, a sudden change in temperature or insects like scale, aphids or a specific wasp larva that burrows into the leaf petioles.

When the trees are stressed by drought or sucking insects like aphids, the leaves will turn yellow or brown before dropping. Jul 28, All of them"leafed" out this spring, but the leaves have become droopy and unhealthy looking except for the Norway. The sugar maple particularly looks unhealthy with the leaves drooping and wilted, and browning. The red maples are also drooping but not as discolored. Any ideas what might be causing this?